Influence of Impurities, Such as Carbon and Sulfur, on the High-Temperature Oxidation Behavior of Fe sub 72 Cr sub 23 Al sub 5 Alloys

Kinetic and analytical study of oxidation behavior of Fe sub 72 Cr sub 23 Al sub 5 alloy in relation to the microstructure, particularly carbon and sulfur localization and chemical state, indicates that these elements have a strong influence on alumina growth and adherence. Competition between oxida...

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Bibliographic Details
Published in:Journal of materials science 1984-10, Vol.19 (10), p.3173-3184
Main Authors: Abderrazik, G B, Moulin, G, Huntz, A M, Berneron, R
Format: Article
Language:English
Online Access:Get full text
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Summary:Kinetic and analytical study of oxidation behavior of Fe sub 72 Cr sub 23 Al sub 5 alloy in relation to the microstructure, particularly carbon and sulfur localization and chemical state, indicates that these elements have a strong influence on alumina growth and adherence. Competition between oxidation and a carbide precipitation slightly increases the oxidation rate during isothermal treatments but has a beneficial influence on the oxide scale adherence. Sulfide precipitation in the metallic substrate has a disastrous effect on oxidation: large weight gains are observed, due to internal oxidation at sulfides and presence of S in the alumina. It was confirmed that alumina growth is controlled by preferential oxygen diffusion along short-circuit paths. 22 ref.--AA
ISSN:0022-2461